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Home / Products / Test & Measuring Instruments / Capacitance & Tan Delta Measurement System ( Model : MLS-11D )
Capacitance & Tan Delta Measurement System
Model : MLS-11D
 

C & TAN d BRIDGE

Applications :
• Power Systems • Testing of H.T. Transformers, Motors, Generators, Bushings.
• Power Cables • H.T. & L.T. Power Capacitors • High Voltage Laboratories.

 

INTRODUCTION

Electrical properties of insulating systems change due to age and continuous electrical stress. By measuring electrical properties such as Capacitance and Tan d regularly it is possible to ensure the operational reliability of H.V. insulating systems and to avoid costly breakdowns. This is particularly important for high voltage bushings, power transformers, generators, power capacitors, H.T. cables etc.

SIVA Capacitance and Tan d test set comprises of C and Tan d Bridge Model MLS-11D, High Voltage Power Supply Model HLS-12 with built in standard capacitor, and set of cables. The compact design of the Bridge uses the principle of three winding differential transformer on a high permeability u metal core. The Bridge is contained in a sturdy metallic housing with u metal lining which shields it from external electromagnetic & electrostatic influences. Built in battery powered Null indicator makes the Bridge suitable for operation in workshop, factories, High Voltage sub-stations, Switch Yards etc.

The High Voltage Power Supply model HLS-12 is provided with built in SF6 gas filled standard capacitor. It is suitable for both grounded as well as ungrounded objects. Capacitance & Tan d are measured directly, no further calculations are required.
 
TECHNICAL SPECIFICATIONS

Capacitance :
Range : 1 pF to 0.1uF in three ranges with Cs=100pF

Resolution :  
Cx multiplying Factor Resolution
0.01 0.1 pF
0.1 1 pF
1 10pF
10 100pF
Accuracy : ± 1% of reading. The capacitance range can be extended further  using external current transformer
 
Tan d Range : 0.0001 to 11.1 in three ranges.

Tan Factor Tan d Range Resolution
0.1 1 x 10-4 to 0.11 2 x 10-4
1 1 x 10-4 to 0.11 2 x 10-4
10 1 x 10-4 to 0.11 2 x 10-4
Accuracy :
± 1 to 2 % of reading ±  1 to 2 x 10-4 for MLS-11D
± 1 to 2 % of reading ±  1 to 2 x 10-4 for MLS-12D

Null Detector
Built in battery operated electronic Null Detector. This type of Null Detector is most suitable for balancing of the Bridge. It gives high sensitivity and accuracy for most of the applications and it is very user friendly. Phase sensitivity Null Detector can be given in place of electronic Null Detector on request. For higher sensitivity and accuracy. oscillographic null detector model MK-1 for critical operation is also available.

Interface Suppression
The C & Tan d Bridge has been specially shielded with u metal sheets to avoid the effect of external interferences. This makes the measurement accurate in both indoor as well as out door applications particularly in Switch yards. Phase reversal switch provided in the H.V. Power Supply effectively cancels interference/pick up by the object under test in energized environment. For situation where the induction is excessive, and cannot be cancelled by phase reversal switch a separate three level interference suppression unit can also be given with separate C & Tan d adjustments.

Protection :
The Bridge is provided with built in high voltage protection devices which protect the Bridge and operator against failure of test object or standard capacitor.

Power Supply : Dry Batteries, 1.5 V x 8 nos.
Size : 510 x 220 x 310 mm
Weight : 20 Kg.
 
To keep pace with the latest technology Sivananda Electronics reserves the right to update it's system. Hence, information in the brochure is likely to change without notice.

Related Links
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(PDF format, Size= 85KB)

 

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See Also
Automatic C & Tand Bridge - Model : MLS11DA & HLS12A
High Voltage Power Supply - Model : HLS-12
Capacitance & Tan Delta Measurement System ( Model : MLS-11D )
Automatic C & Tand Bridge - Model : MLS-11DA(I) & HLS12A , LINE & GENERATED FREQUNCY OPERATED
Automatic C & Tand Bridge - Model : MLS-5A & HLS5A (Front Panel Controlled)
Automatic C & Tand Bridge - Model : MLS-11DA 200mA & HLS12A (Front Panel Controlled)
Capacitance & Tan Delta Measurement System ( Model : MLS-11DM )-Semi Automatic System

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Over 250 Innovative Products Caters priority sectors - Defense, Power, Communication, Railways
Sivananda Electronics
Head Office & Works : Deepak Mahal, Lam Road, Devlali, Nashik, Maharashtra, India - 422 401
Tel.: +91-253-2491816,2491423,2491504 Fax: +91-253-2492291 ,Email: mkb@sivanandaelctronics.com , Web : www.sivanandaelectronics.com

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